I'm working on an application that needs a counting down start stop clock, ability to be set to a specified time such as 20 minutes. I can prob figure out the code to that.

It does not have to be uberly time accurate, however, if possible, the ability to show the clock the clocks precision to a tenth of a second when under 1 minute.

so 59.9, 1.7, etc.

I searched some code on here, the code count downs accurately for a while, but I think the translation to format the clock is wrong, it counts down to random times.

Any idea's help, code?